I downloaded this to my Critique Club folder so I could view it in PS and crop out the border which I found really overwhelming and unattractive, point I made rather too bluntly during the voting.
I really enjoy the vibrant contrast between the purple and yellow which, as I'm sure you're aware, are complementary colors. While it is possible that centering the yellow would make a more dynamic composition, I'm not convinced of this. I rather enjoy the off-center placement.
I agree with the other commenters that the water droplet adds a distracting note to an otherwise very simple, dynamic scheme of color and radiating lines. This is just a nit but I feel this could have been cropped to eliminate the blurry patch of grey-blue at the bottom right corner which detracts from the simplicity of the purple and yellow.
This is the kind of composition that would look fabulous blown-up extra-large.
There have been many shots of this type submitted to various challenges in the past (mine included).. so they really have to have something special to offer and I think this does..the splash of yellow, which always contrasts well with purple, gives the image the lift it needs and adds to the overall abstract quality.
Nice work